title: A curious isolated cystic lesion of the membranous atrioventricular septum.
abstract: We present the case of an isolated cystic lesion of the atrioventricular component of the membranous septum of unclear aetiology, but responsible for cardiomegaly and benign disturbances of cardiac rhythm. As far as we are aware, this type of lesion has not previously been documented.
authors.affiliation: Division of Pediatric Cardiology, Department of Pediatrics, The Children's Hospital of Denver, Aurora, Colorado, USA. phelps.christina@tchden.corg
authors.forename: Christina M
authors.initials: CM
authors.lastname: Phelps
authors.forename: Sarah
authors.initials: S
authors.lastname: Mengshol
authors.forename: David Dunbar
authors.initials: DD
authors.lastname: Ivy
mesh_terms: D001145:Arrhythmias, Cardiac / Q000150:complications; D006332:Cardiomegaly; D002675:Child, Preschool; D003560:Cysts / Q000151:congenital / Q000000981:diagnostic imaging / Q000601:surgery; D003937:Diagnosis, Differential; D006338:Heart Neoplasms / Q000151:congenital / Q000000981:diagnostic imaging / Q000601:surgery; D006339:Heart Rate; D006346:Heart Septum; D006801:Humans; D008297:Male; D014463:Ultrasonography